CN106958702B

CN106958702B - Pipeline connection structure, water tank and water heater

Info

Publication number: CN106958702B
Application number: CN201710235893.1A
Authority: CN
Inventors: 邓伟彬; 胡楚鑫; 袁明征
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2017-04-11
Filing date: 2017-04-11
Publication date: 2023-08-25
Anticipated expiration: 2037-04-11
Also published as: CN106958702A

Abstract

The application provides a pipeline connecting structure, a water tank and a water heater. Wherein, pipeline connection structure includes: a first pipe member; the connecting seat is sleeved on the periphery of the first pipeline piece and is provided with a first axial through hole communicated with the first pipeline piece, the first axial through hole comprises a first hole section and a second hole section which are communicated with each other, and the first end of the first pipeline piece extends into and is fixed in the first hole section; wherein, at least a part of the inner wall surface of the first hole section is provided with a rust-proof layer. The connecting seat in the pipeline connecting structure is not easy to corrode.

Description

Pipeline connection structure, water tank and water heater

Technical Field

The application relates to the technical field of water storage devices, in particular to a pipeline connection structure, a water tank and a water heater.

Background

The water tank is used as a water storage device and generally comprises a liner body for storing water and a water inlet and outlet pipe fitting connected with the liner body.

In the prior art, a water inlet and outlet pipe fitting of the water tank is connected with the water tank through a connecting seat fixed on the liner body, and the connecting seat is in direct contact with water in the water tank, so that the water tank is easy to corrode.

Disclosure of Invention

The main object of the present application is to provide a pipe connection structure, a water tank and a water heater, wherein a connection seat in the pipe connection structure is not easy to corrode.

In order to achieve the above object, according to one aspect of the present application, there is provided a pipe connection structure including: a first pipe member; the connecting seat is sleeved on the periphery of the first pipeline piece and is provided with a first axial through hole communicated with the first pipeline piece, the first axial through hole comprises a first hole section and a second hole section which are communicated with each other, and the first end of the first pipeline piece extends into and is fixed in the first hole section; wherein, at least a part of the inner wall surface of the first hole section is provided with a rust-proof layer.

Further, the pipe connection structure further comprises a stop flange located on the inner wall of the first bore section.

Further, the first hole section includes first unthreaded hole section and second unthreaded hole section, and the backstop flange is located between first unthreaded hole section and the second unthreaded hole section, and the first end of first pipeline spare is fixed in the second unthreaded hole section, is equipped with the rust-resistant layer on the inner wall of first unthreaded hole section.

Further, the pipe connection structure further comprises a sealing member located between the connection seat and the first pipe member and securing the first end of the first pipe member within the first bore section.

Further, the sealing member has a second axial through hole, the first end of the first pipe member is fixed in the second axial through hole, the sealing member has a first fitting portion, and the first pipe member has a second fitting portion that is fitted with the first fitting portion.

Further, the first pipeline piece comprises a body and a flanging connected with the body, the flanging forms a second matching part, and the first matching part is a groove arranged on the inner wall of the second axial through hole.

Further, a first positioning part is arranged on the first pipeline piece, and a second positioning part matched with the first positioning part is arranged on the sealing piece.

Further, the first positioning part is a first positioning groove penetrating through the flanging of the first pipeline piece, and the second positioning part is a first positioning column arranged in the groove on the inner wall of the second axial through hole of the sealing piece.

Further, the first locating portions are multiple, and the first locating portions are arranged at intervals along the circumferential direction of the first pipeline piece.

Further, the seal includes a first tube segment and a second tube segment connected to the first tube segment, the second tube segment having an outer diameter greater than the outer diameter of the first tube segment to form a stepped surface structure, the stepped surface structure cooperating with the stop flange, the interior through-hole of the first tube segment and the interior through-hole of the second tube segment collectively forming a second axial through-hole of the seal.

Further, a third positioning part is arranged on the connecting seat, and a fourth positioning part matched with the third positioning part is arranged on the sealing element.

Further, the third positioning part is a second positioning groove positioned on the stop part between the first hole section and the second hole section, and the fourth positioning part is a second positioning column arranged on the outer wall of the sealing piece.

Further, the plurality of third positioning parts are arranged at intervals along the circumference of the first axial through hole.

Further, the pipe connection structure includes a locking member disposed within the first axial through hole, the locking member being configured to lock the seal member between the stop flange and the locking member, the locking member having a third axial through hole.

Further, the second hole section is provided with internal threads, the locking piece is positioned in the second hole section, and the outer wall of the locking piece is provided with external threads matched with the internal threads.

Further, the axial dimension of the locking member is smaller than the axial dimension of the second hole section.

Further, the pipeline connecting structure further comprises a protective sleeve arranged outside the connecting seat, and the protective sleeve is provided with a fourth axial through hole communicated with the first axial through hole.

According to another aspect of the present application, there is provided a water tank including a tank body, a mounting through hole provided on the tank body, and a pipe connection structure provided at the mounting through hole, the pipe connection structure being the aforementioned pipe connection structure.

According to a third aspect of the present application, there is provided a water heater comprising a main unit and a water tank connected to the main unit, the water tank being the water tank described above.

By applying the technical scheme of the application, the rust-proof layer is arranged on the inner wall surface of at least one part of the first hole section, so that the inner surface of the connecting seat can be prevented from being directly contacted with water in the water tank, and the connecting seat is prevented from being corroded.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

fig. 1 shows a sectional view of a tank body connected to a water tank by a pipe connection structure according to the present application;

FIG. 2 illustrates a front view of a first piping component of the piping connection structure of FIG. 1;

FIG. 3 shows a right side view of the first conduit member of FIG. 2;

FIG. 4 shows a cross-sectional view of the seal of the pipe connection of FIG. 1;

FIG. 5 shows a front view of the seal of FIG. 4;

fig. 6 shows a left side view of the seal of fig. 4.

FIG. 7 shows a cross-sectional view of the connection base of the pipe connection structure of FIG. 1; and

fig. 8 shows a right side view of the connection socket of fig. 7.

Wherein the above figures include the following reference numerals:

10. a connecting seat; 11. a first axial through hole; 12. a stop flange; 111. a first bore section; 112. a second bore section; 121. a second positioning groove; 122. a sidewall; 20. a seal; 21. a second axial through hole; 22. a groove; 23. a first pipe section; 24. a second pipe section; 221. a first positioning column; 231. a second positioning column; 30. a first pipe member; 31. a body; 32. flanging; 321. a first positioning groove; 40. a locking member; 41. a third axial through hole; 50. a protective sleeve; 51. a fourth axial through hole; 60. a liner body; 61. and (5) installing the through holes.

Detailed Description

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The application provides a pipeline connecting structure, a water tank and a water heater.

In the present application and embodiments of the present application, a water heater includes a main unit and a water tank connected to the main unit.

In the present application and the embodiments of the present application, the water tank includes a bladder 60, a mounting through hole 61 provided on the bladder 60, and a pipe connection structure provided at the mounting through hole 61.

In the embodiments of the present application and the embodiments of the present application, in order to solve the problem that in the prior art, a connection seat of a pipeline connection structure is in direct contact with water in a water tank and is easy to be corroded, the pipeline connection structure is improved, and the following is specifically described:

as shown in fig. 1, in the embodiment of the present application, the pipe connection structure includes a first pipe member 30 and a connection base 10. The connecting seat 10 is sleeved on the periphery of the first pipeline piece 30, and the connecting seat 10 is provided with a first axial through hole 11 communicated with the first pipeline piece 30. The first axial through hole 11 includes a first hole section 111 and a second hole section 112 which are communicated, and a first end of the first pipe member 30 extends into and is fixed in the first hole section 111. At least a part of the inner wall surface of the first hole section 111 is provided with a rust-preventive layer. The first end of the first pipe element 30 refers to the right end of the first pipe element 30 in fig. 1.

By the above arrangement, the rust-preventive layer is provided on the inner wall surface of at least a portion of the first hole section 111, so that the inner surface of the connection seat 10 can be prevented from directly contacting with water in the water tank, thereby preventing the connection seat 10 from being corroded. When the above-mentioned pipe connection structure is connected to the tank, water can be introduced into and discharged from the tank through the first axial through-hole 11 communicating with the first pipe member 30.

Optionally, to ensure strength, the connection mount 10 is a carbon steel material.

Preferably, the rust preventive layer is a ceramic material.

Preferably, in an embodiment of the present application, the first pipe element 30 is made of stainless steel material to meet the strength requirements.

Alternatively, the first pipe element 30 may also be made of a plastic material in order to increase the corrosion resistance of the first pipe element 30.

Specifically, in the embodiment of the present application, the connection seat 10 is welded to the outer wall surface of the bladder 60 to connect the pipe connection structure with the tank.

As shown in fig. 1 and 7, in the embodiment of the present application, the pipe connection structure further includes a stop flange 12 located on the inner wall of the first hole section 111.

Through the arrangement, when the antirust layer is coated, a tool matched with the stop flange 12 can be adopted to block the stop flange 12, and then the step of coating the antirust layer is carried out, so that materials of the antirust layer are prevented from entering the other side of the stop flange 12. At the same time, the provision of the stop flange 12 may facilitate the fixing of the first pipe element 30.

Specifically, as shown in fig. 1, a rust-preventive layer is also provided on the left side wall 122 of the stopper flange 12. Thus, all inner wall surfaces of the first unthreaded hole section can be isolated from water, and rust is prevented.

When the rust-proof layer is coated, the connecting seat 10 is welded on the liner body 60 to be assembled into a liner assembly, then the liner assembly is coated with enamel, the position of the stop flange 12 is blocked by using a tool, the whole first unthreaded hole section is coated with the enamel, then the enamel is dried, and the tool is removed before passing through a furnace. And heating the porcelain glaze in a furnace, and sintering and cooling the porcelain glaze to finish the setting of the porcelain glaze. The pipeline connecting structure has the characteristics of simple structure, easy realization of the process and low cost.

As shown in fig. 1 and 7, in an embodiment of the present application, the first aperture section 111 includes a first aperture section and a second aperture section, with the stop flange 12 located therebetween. The first end of the first pipe member 30 is fixed in the second unthreaded hole section, and an antirust layer is provided on the inner wall surface of the first unthreaded hole section.

Because the first end of the first pipeline member 30 is fixed in the second unthreaded hole section without the antirust layer, the tool matched with the stop flange 12 is blocked at the stop flange 12 when the antirust layer is coated, so that the material of the antirust layer can be prevented from entering the second unthreaded hole section for fixing the first pipeline member 30, and the antirust layer is prevented from affecting the sealing fit between the first pipeline member 30 and the connecting seat 10.

As shown in fig. 1, in the embodiment of the present application, the road connection structure further includes a sealing member 20, and the sealing member 20 is located between the connection seat 10 and the first pipe member 30 and fixes the first end of the first pipe member 30 in the first hole section 111.

With the above arrangement, the first pipe element 30 can be connected with the connecting socket 10 directly by the sealing element 20 in a sealing manner. Specifically, the sealing member 20 is in sealing engagement with the first pipe member 30 and the connection base 10, respectively, such that the first pipe member 30 can be directly connected with the connection base 10 in a sealing manner through the sealing member 20 sleeved on the outer periphery thereof.

Compared with the prior art that the first pipeline piece 30 is connected with the connecting seat 10 through the pipeline piece joint and the sealing gaskets, the pipeline connecting structure has the advantages that the number of parts is reduced, the pipeline connecting structure is simplified, and the process difficulty of part processing and the assembly difficulty of the pipeline connecting structure are reduced.

Specifically, as shown in FIG. 1, the seal 20 mates with the stop flange 12.

By the arrangement, sealing fit can be formed between the sealing element 20 and the connecting seat 10, and water leakage between the sealing element 20 and the connecting seat 10 is avoided.

As shown in fig. 1 and 4, in the embodiment of the present application, the seal 20 has a second axial through hole 21. The first end of the first pipe element 30 is fixed in the second axial through hole 21. The seal 20 has a first mating portion and the first conduit member 30 has a second mating portion that mates with the first mating portion.

In the above arrangement, the first end of the first conduit member 30 is located within the second axial through bore 21 of the seal member 20 so as to form a sealing engagement between the seal member 20 and the first conduit member 30, avoiding leakage of water from between the seal member 20 and the first conduit member 30. The sealing member 20 has a first mating portion, and the first pipe member 30 has a second mating portion that mates with the first mating portion, so that the first pipe member 30 can be reliably fixed to the sealing member 20, and the occurrence of a play between the first pipe member 30 and the sealing member 20, which results in poor sealing and water leakage, is prevented.

Specifically, as shown in fig. 1 and 2, in the embodiment of the present application, the first pipe member 30 includes a body 31 and a flange 32 connected to the body 31, the flange 32 forms a second mating portion, and the first mating portion is a groove 22 provided on an inner wall of the second axial through hole 21.

The first matching part is formed by the groove 22 on the inner wall of the second axial through hole 21, the flanging 32 forms the second matching part, the structure is simple, the processing and the assembly are convenient, the process difficulty and the production cost of parts can be reduced, and the assembly efficiency of the pipeline connecting structure is improved.

Specifically, as shown in fig. 3, the flange 32 is an annular flange connected to one end of the body 31. The flange 32 is formed by a stamping process directly during the processing of the first conduit member 30. As shown in fig. 1 and 4, the groove 22 is an annular groove having the same groove width as the wall thickness of the flange 32. The flange 32 is inserted into the recess 22 to form a plug-in fit.

The above arrangement is simple and a reliable sealing engagement can be made between the first conduit member 30 and the sealing member 20 in the circumferential direction.

More specifically, as shown in FIG. 1, the diameter of the bottom wall of the recess 22 is greater than the outer diameter of the flange 32. I.e. the first pipe element 30 is assembled to the sealing element 20, there is a gap between the bottom wall of the recess 22 and the outer diameter of the flange 32.

This facilitates insertion of the flange 32 into the recess 22, and prevents the seal from being too tight due to deformation of the seal 20 caused by abutment of the outer wall of the flange 32 against the bottom wall of the recess 22, thereby improving the reliability of the seal.

In an alternative embodiment, not shown in the drawings, the second mating portion may also be at least one annular flange provided on the outer wall of the body 31, the first mating portion being an annular groove provided on the inner wall of the second axial through hole 21 and adapted to the annular flange.

In the embodiment of the present application, the first pipe member 30 is provided with a first positioning portion, and the sealing member 20 is provided with a second positioning portion that is matched with the first positioning portion.

Through the arrangement, the first positioning part and the second positioning part which are matched with each other can fix the assembly angle of the first pipeline piece 30 relative to the sealing piece 20, so that the first pipeline piece 30 and the sealing piece 20 are prevented from rotating relatively, the sealing piece 20 is further prevented from being worn when the first pipeline piece 30 rotates, and poor sealing caused by abrasion of the sealing piece is avoided, and water leakage is avoided.

Alternatively, the first positioning portions are plural and are disposed at intervals along the circumferential direction of the first pipe member 30. The second positioning parts are arranged in one-to-one correspondence with the first positioning parts.

The above arrangement increases the matching parts of the first pipe fitting 30 and the sealing member 20, and can improve the fixing and rotation stopping effects of the first positioning part and the second positioning part, and improve the reliability of the pipe connection structure.

As shown in fig. 2 and 3, in the embodiment of the present application, the first positioning portion is a first positioning groove 321 penetrating through the flange 32 of the first pipe element 30. As shown in fig. 5 and 6, the second positioning portion is a first positioning post 221 provided in a groove 22 on the inner wall of the second axial through hole 21.

With the above arrangement, when the first pipe member 30 is assembled to the sealing member 20, the first positioning post 221 is caught in the first positioning groove 321, thereby fixing the assembly angle of the first pipe member 30 with respect to the sealing member 20 while preventing the first pipe member 30 from rotating. The structure has simple processing technology and easy assembly.

Specifically, the number of the first positioning grooves 321 is four, and the four first positioning grooves 321 are uniformly distributed along the circumferential direction of the flange 32. The four first positioning columns 221 and the four first positioning grooves 321 are uniformly distributed in the groove 22 in a one-to-one correspondence.

In an alternative embodiment, not shown in the drawings, the first positioning portion may also be an axial rib provided on the outer wall of the body 31, and the second positioning portion is an axial groove provided on the inner wall of the second axial through hole 21.

As shown in fig. 4 and 5, the seal 20 includes a first pipe segment 23 and a second pipe segment 24 connected to the first pipe segment 23. The second tube section 24 has an outer diameter greater than the outer diameter of the first tube section 23 to form a stepped surface configuration that mates with the stop flange 12. The inner through-hole of the first tube section 23 and the inner through-hole of the second tube section together form the second axial through-hole 21 of the seal 20.

By the arrangement, the step surface structure of the sealing element 20 is abutted against the side surface of the stop flange 12, the sealing element 20 is reliably fixed in the connecting seat 10, and the sealing element 20 and the connecting seat 10 are convenient to form sealing fit.

Optionally, the outer diameter of the first tube section 23 is adapted to the inner diameter of the stop flange 12.

In this way, a sealing fit can also be formed between the outer wall of the first tube section 23 and the inner wall of the stop flange 12, improving the reliability of the seal.

In the embodiment of the application, the connecting seat 10 is provided with a third positioning part, and the sealing element 20 is provided with a fourth positioning part matched with the third positioning part.

Through the arrangement, the assembly angle of the sealing element 20 relative to the connecting seat 10 can be fixed, the sealing element 20 and the connecting seat 10 are prevented from rotating relatively, and poor sealing and water leakage caused by abrasion of the sealing element 20 due to rotation are avoided.

Optionally, the plurality of third positioning portions are arranged at intervals along the circumferential direction of the connection seat 10. The fourth positioning parts are arranged in one-to-one correspondence with the third positioning parts.

The above arrangement increases the matching parts of the sealing member 20 and the connecting seat 10, can improve the fixing and rotation stopping effects of the third positioning part and the fourth positioning part, and improves the reliability of the pipeline connecting structure.

As shown in fig. 7 and 8, the third positioning portion is a second positioning groove 121 provided on the stopper flange 12, and the fourth positioning portion is a second positioning post 231 provided on the outer wall of the seal 20.

With the above arrangement, when the sealing member 20 is assembled to the connection block 10, the second positioning posts 231 are inserted into the first positioning grooves 321, so that the assembly angle of the sealing member 20 with respect to the connection block 10 can be fixed while preventing the sealing member 20 from rotating. The structure has simple processing technology and easy assembly.

Specifically, as shown in fig. 7, the second positioning groove 121 is a groove extending from the right side wall face to the left side wall face of the stopper flange 12, that is, the second positioning groove 121 extends in the thickness direction of the stopper flange 12. As shown in fig. 5, the second positioning column 231 is a column extending from the left end surface of the second pipe section 24 toward the direction in which the first pipe section 23 is located.

As shown in fig. 1, in the embodiment of the present application, the pipe connection structure further includes a locking member 40 disposed in the first axial through hole 11, the locking member 40 being used to lock the sealing member 20 between the stopper flange 12 and the locking member 40. The locking member 40 has a third axial through hole 41.

The seal 20 is more securely locked between the stop flange 12 and the locking member 40 by the locking member 40 so that the seal 20 does not move circumferentially. The stepped surface configuration of the seal 20 may abut the side of the stop flange 12 to enhance the sealing effect. The third axial through hole 41 of the locking member 40 may communicate with the first axial through hole 11 and the inner through hole of the first pipe member 30 to facilitate water inflow and outflow.

Alternatively, in the embodiment of the present application, the hole cross section of the third axial through hole 41 is hexagonal, so that the locking member 40 can be easily installed by a hexagonal wrench.

As shown in fig. 1 and 7, in the embodiment of the present application, the second hole section 112 has an internal thread, the locking member 40 is located in the second hole section 112, and an external thread matched with the internal thread is provided on an outer wall of the locking member 40.

In the above arrangement, retaining member 40 is positioned within second bore section 112 to facilitate assembly of retaining member 40 and retaining seal member 20.

Specifically, the second tube segment 24 of the seal 20 is positioned within the second light aperture segment.

When assembling, the sealing element 20 is sleeved on the first pipeline element 30 in advance, then the first pipeline element 30 with the sealing element 20 is installed in the first hole section 111, the sealing element 20 is abutted against the stop flange 12, and then the locking element 40 is installed in the second hole section 112 to lock the sealing element 20. The seal 20 is compressed by the locking member 40, embracing the first conduit member 30, thereby achieving a secure seal and securement.

Alternatively, as shown in FIG. 1, retaining member 40 has an axial dimension that is less than an axial dimension of second bore section 112.

In this way, the end of the second bore section 112 remote from the first bore section 111 can be directly connected to the second pipe element without providing additional connecting elements, thereby simplifying the pipe connection structure.

Further, in the prior art, the thread connected to the second pipe fitting (external water pipe) is provided on the pipe fitting joint, and the pipe fitting joint is locked on the connection base 10 by the joint locking member which is sleeved outside the connection base 10 and is screwed to the connection base 10. When the second pipeline piece and the pipeline piece connector are connected or detached, the pipeline piece connector is easy to rotate and drives the connector locking piece contacted with the pipeline piece connector to rotate, so that the connector locking piece is loosened to cause water leakage. In order to prevent the above phenomenon, in the prior art, a nylon gasket (PA 66 plastic material) is disposed at the contact surface of the pipe fitting joint and the joint locking member to reduce the friction force between the pipe fitting joint and the joint locking member, but the joint locking member cannot be prevented from loosening. Compared with the prior art, through setting up second hole section 112 in connecting seat 10, install retaining member 40 in second hole section 112, the one end that second hole section 112 did not install retaining member 40 is connected with the second pipeline spare, can avoid retaining member 40 pine to take off, thereby avoid the water leakage that retaining member 40 pine took off and led to the fact.

When the rust preventive layer is applied, if the second hole section 112 has enamel, the enamel cannot be matched with the locking piece 40, so that the whole liner assembly is scrapped. Therefore, the second hole section 112 is checked and cleaned before passing through the furnace, so that the screw teeth are free of enamel. As shown in fig. 1, the pipe connection structure further includes a protective sleeve 50 disposed outside the connection base 10, the protective sleeve 50 having a fourth axial through hole 51 communicating with the first axial through hole 11.

The protective sleeve 50 is provided to protect the outer wall of the connection base 10 from direct contact with water, thereby preventing the connection base 10 from rusting.

Specifically, as shown in fig. 1, the protecting sleeve 50 is sleeved outside the right end of the connection seat 10, and the protecting sleeve 50 is in interference fit with the connection seat 10.

Preferably, the protective sheath 50 is made of a plastic material.

In the prior art, the water inlet and outlet pipeline connecting structure of the water tank consists of a water inlet and outlet pipe, a water pipe connector, a water inlet and outlet connector, a transfer connector, 2 sealing gaskets and a nylon gasket, and has the characteristics of complex process, high processing tolerance requirement, high process requirement, difficult assembly, multiple parts, high cost, easy leakage, poor reliability and the like. Meanwhile, the enamel process requirement on the front end of the water inlet and outlet joint is very high, enamel cannot enter the sealing gasket, and otherwise, the phenomenon of water leakage caused by poor sealing can occur.

The pipe connection structure of the application adopts a connecting seat 10 to be welded with the middle section of the liner body 60, the first axial through hole 11 is provided with a second hole section 112, and the locking piece 40 made of stainless steel material is used for fastening the first pipe piece 30 and the sealing piece 20. The second hole section 112 can be directly connected with a water pipeline of a user, and has the advantages of simple structure, convenience, reliability, low process requirement, simple and reliable process, reliable quality and convenient after-sale installation.

From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects: at least a part of the inner wall surface of the first hole section is provided with a rust-proof layer, so that the inner surface of the connecting seat can be prevented from being directly contacted with water in the water tank, and the corrosion of the connecting seat is prevented.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pipe connection structure, characterized in that the pipe connection structure comprises:

a first pipe member (30);

the connecting seat (10) is sleeved on the periphery of the first pipeline piece (30), the connecting seat (10) is provided with a first axial through hole (11) communicated with the first pipeline piece (30), the first axial through hole (11) comprises a first hole section (111) and a second hole section (112) which are communicated, and the first end of the first pipeline piece (30) stretches into and is fixed in the first hole section (111);

wherein at least a part of the inner wall surface of the first hole section (111) is provided with a rust-proof layer;

the pipe connection further comprises a stop flange (12) located on the inner wall of the first bore section (111);

the pipeline connecting structure further comprises a sealing element (20), wherein the sealing element (20) is positioned between the connecting seat (10) and the first pipeline piece (30) and fixes the first end of the first pipeline piece (30) in the first hole section (111); the sealing element (20) comprises a first pipe section (23) and a second pipe section (24) connected with the first pipe section (23), wherein the outer diameter of the second pipe section (24) is larger than that of the first pipe section (23) so as to form a step surface structure, the step surface structure is matched with the stop flange (12), and the inner through hole of the first pipe section (23) and the inner through hole of the second pipe section (24) jointly form a second axial through hole (21) of the sealing element (20);

the pipeline connecting structure comprises a locking piece (40) arranged in the first axial through hole (11), the locking piece (40) is used for locking the sealing piece (20) between the stop flange (12) and the locking piece (40), and the locking piece (40) is provided with a third axial through hole (41).

2. The pipe connection structure according to claim 1, wherein the first hole section (111) includes a first unthreaded hole section and a second unthreaded hole section, the stopper flange (12) is located between the first unthreaded hole section and the second unthreaded hole section, the first end of the first pipe member (30) is fixed in the second unthreaded hole section, and a rust-proof layer is provided on an inner wall surface of the first unthreaded hole section.

3. The pipe connection structure according to claim 1, wherein the seal member (20) has a second axial through hole (21), a first end of the first pipe member (30) is fixed in the second axial through hole (21), the seal member (20) has a first fitting portion, and the first pipe member (30) has a second fitting portion fitted with the first fitting portion.

4. A pipe connection according to claim 3, characterized in that the first pipe piece (30) comprises a body (31) and a flange (32) connected to the body (31), the flange (32) forming the second mating portion, the first mating portion being a groove (22) provided on the inner wall of the second axial through hole (21).

5. The pipe connection structure according to claim 1, wherein the first pipe member (30) is provided with a first positioning portion, and the sealing member (20) is provided with a second positioning portion that mates with the first positioning portion.

6. The pipe connection structure according to claim 5, wherein the first positioning portion is a first positioning groove (321) penetrating through a flange (32) of the first pipe member (30), and the second positioning portion is a first positioning post (221) disposed in a groove (22) on an inner wall of a second axial through hole (21) of the sealing member (20).

7. The pipe connection structure according to claim 5, wherein the first positioning portions are plural, and the plural first positioning portions are disposed at intervals along the circumferential direction of the first pipe member (30).

8. The pipeline connecting structure according to claim 1, wherein a third positioning portion is provided on the connecting seat (10), and a fourth positioning portion matched with the third positioning portion is provided on the sealing member (20).

9. The pipe connection according to claim 8, characterized in that the third positioning part is a second positioning groove (121) on the stop flange (12) between the first and second hole segments (111, 112), and the fourth positioning part is a second positioning post (231) provided on the outer wall of the seal (20).

10. The pipe connection structure according to claim 8, wherein the third positioning portions are plural, and the plural third positioning portions are disposed at intervals along the circumferential direction of the first axial through hole (11).

11. The pipe connection according to claim 1, wherein the second hole section (112) has an internal thread, the locking member (40) is located in the second hole section (112), and an external thread matching the internal thread is provided on an outer wall of the locking member (40).

12. The pipe connection according to claim 11, characterized in that the axial dimension of the locking member (40) is smaller than the axial dimension of the second bore section (112).

13. A pipe connection according to claim 1 or 2, characterized in that it further comprises a protective sleeve (50) arranged outside the connection seat (10), the protective sleeve (50) having a fourth axial through hole (51) communicating with the first axial through hole (11).

14. A water tank comprising a tank body (60), a mounting through hole (61) provided on the tank body (60), and a pipe connection structure provided at the mounting through hole (61), characterized in that the pipe connection structure is the pipe connection structure according to any one of claims 1 to 13.

15. A water heater comprising a main unit and a water tank connected to the main unit, wherein the water tank is the water tank of claim 14.